JP3934280B2 - Surveillance camera device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a surveillance camera device that installs surveillance cameras in buildings, stores, and other places to monitor and record the behavior of suspicious individuals.
In particular, the present invention relates to a surveillance camera device capable of detecting in advance an illegal act that does not cause a suspicious person to be imaged by illegally changing the imaging direction of the surveillance camera.
[0002]
Conventionally, a surveillance camera is installed in the store, which is the monitoring location, or at the entrance of the store, and the image data transmitted from the surveillance camera is displayed on a monitor provided in the monitoring center, or the image data is recorded and recorded afterwards. Surveillance camera devices are known as evidence. In such a monitoring camera device, the imaging direction is adjusted so as to image a predetermined monitoring location, and the monitoring camera is fixed to the ceiling or the like using an attachment mechanism, for example.
[0003]
However, in the above-described conventional surveillance camera device, for example, a person who performs an unauthorized act turns the surveillance camera with his hand to change the imaging direction of the surveillance camera and removes the surveillance area from the field of view of the surveillance camera. There is a risk of action.
Since the imaging state changes due to an unauthorized act of changing the imaging direction of the surveillance camera, if the monitor in the monitoring center constantly monitors the monitor, such an unauthorized act can be noticed. Since monitoring is not always performed, there may be cases where the user is unaware of an illegal act such as changing the imaging direction of the surveillance camera. The fact that the imaging direction of the surveillance camera has been changed can be known later from the recording result, but in that case, it is often a long time after the fraud has been performed.
[0004]
Even when the monitoring staff is constantly monitoring the monitor at the monitoring center, when the image data of a number of monitoring cameras are sequentially switched and displayed on the monitor, such unauthorized changes in the imaging direction cannot be monitored There is.
[0005]
As a method for detecting such an unauthorized change in the imaging range, the applicant of the present application has disclosed a method for detecting a part of a surveillance camera supported on a ceiling via a mounting bracket as disclosed in Japanese Patent Laid-Open No. 10-185940. A light emitting / receiving unit is provided, and a reflecting unit such as a mirror is provided at the ceiling facing the light emitting / receiving unit. If the direction of the surveillance camera is changed, the reflected light from the light projecting / receiving unit provided on the surveillance camera Has proposed a surveillance camera device that detects the loss of the camera and detects that the orientation of the surveillance camera has been changed.
[0006]
[Problems to be solved by the invention]
The method disclosed in Japanese Patent Application Laid-Open No. 10-185940 requires that the light projecting / receiving unit is located on a plane parallel to the ceiling surface, so that when the imaging direction of the surveillance camera has an angle with respect to the ceiling, Adjust the direction of the reflection unit provided on the ceiling, the direction of the light projecting / receiving unit attached to the surveillance camera, or the direction of both so that the surface of the reflection unit and the beam axis of the light projecting / receiving unit are orthogonal to each other There is a need.
[0007]
The present invention was devised with the aim of improving the monitoring camera device disclosed in JP-A-10-185940, or an alternative method of the monitoring camera device disclosed in JP-A-10-185940, It is an object of the present invention to provide a surveillance camera device that can more effectively detect a change in the imaging direction or field of view of an imaging means such as a surveillance camera.
[0008]
[Means for Solving the Problems]
  According to the present invention, a monitoring camera that includes a sensor that outputs a change in the imaging direction as an angular velocity and images a predetermined monitoring area, and an attachment for installing the monitoring camera on a fixed portion so that the predetermined imaging direction is directed. Means, a detector for detecting that the imaging direction of the monitoring camera has been changed based on an output from the sensor, and the detectorSaidA monitoring camera device comprising an output unit that outputs a detection signal when a change in a shooting direction is detected, wherein the mounting means is a mounting bracket fixedly installed on the fixing unit, the mounting bracket, and the monitoring The imaging direction of the surveillance camera installed between the camera and the cameraTheChangeRuRotational forceWhen the is applied, the imaging direction changes against the elasticity of the spring.When the rotational force is released,SpringThe surveillance cameraSaidThe imaging directionIn the original imaging directionReturn means to returnWhenThere is provided a surveillance camera device characterized by comprising: The fixed part is a ceiling or the like.
[0009]
  Preferably, the return means includes a first body having a male screw and a second body having a female screw into which the male screw is screwed, and when the spring is subjected to a force in the rotational direction of the screw. Fixed to the first body and the second body so as to have a restoring force.Ru.
  Further preferably, the return means includes first return means in which a rotation direction of the screw is a horizontal direction, and second return means in which a rotation direction of the screw is a vertical direction.
[0010]
  According to the present invention, the detection unit detects that the imaging direction of the monitoring camera has been changed based on the output from the sensor.
  The output unit outputs a detection signal when the detection unit detects a change in the shooting direction of the monitoring camera. Thereby, for example, it is possible to detect that an action to remove the imaging area of the monitoring camera from the monitoring area has been performed.
  Furthermore, by providing return means to the attachment means, for example, even if the imaging direction of the surveillance camera is changed slowly outside the field of view that cannot be detected by the detection unit, When the button is released, the return means act and the imaging direction of the surveillance camera returns to the original imaging direction automatically and quickly. The rapid movement of the monitoring camera by the return means can be detected by the detection unit, so that it is possible to detect immediately after the fraudulent act is performed even in the case of a fraudulent act that slowly changes the direction of the surveillance camera.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of a surveillance camera device of the present invention will be described with reference to the accompanying drawings.
First embodiment
FIG. 1 is an overall configuration diagram of a surveillance camera device according to a first embodiment of the present invention.
The surveillance camera device includes a plurality of surveillance cameras 1A to 1D, a controller 2 connected to the plurality of surveillance cameras 1A to 1D via coaxial cables 5A to 5D, and an image recording device 3 connected to the controller 2 via a coaxial cable 6. And an alarm device 4 connected to the controller 2 and the image recording device 3.
In the present embodiment, the case where four monitoring cameras 1A to 1D are provided has been illustrated, but the number of monitoring cameras is one or more and arbitrary.
[0012]
Each of the plurality of monitoring cameras 1A to 1D has an imaging function and a voice detection function, picks up a predetermined monitoring area, detects a voice signal, and controls the imaging and voice detection results via coaxial cables 5A to 5D. Output to 2.
The controller 2 performs signal processing on the imaging and sound detection results transmitted from the monitoring cameras 1 </ b> A to 1 </ b> D and sends the results to the image recording device 3. The signal processing in the controller 2 will be described later with reference to FIG.
For example, the controller 2 sequentially selects the imaging results (image data) and voice detection results (voice detection data) sent from the monitoring cameras 1A to 1D, and the imaging and voice detection results from the selected monitoring camera are digital signals. And is sent to the image recording apparatus 3. The controller 2 compresses the image data and sound detection data converted into digital signals as necessary, and sends them to the image recording apparatus 3. The image recording device 3 records the image data and sound detection data sent from the controller 2.
When the alarm device 4 processes the abnormal signal transmitted from the controller 2 and detects that an illegal act has occurred, the alarm device 4 transmits an alarm signal via a telephone line to a remote security center (not shown). The alarm device 4 can also transmit an alarm signal to a security center (not shown) when it detects that an illegal act has been performed by sending it from the image recording device 3 and processing an abnormal signal.
[0013]
FIG. 2 is a diagram illustrating a mounting state of a representative surveillance camera 1A among the surveillance cameras 1A to 1D.
A mounting bracket 101 is fixed to the ceiling facing downward. A shaft 102 is provided at the lower end of the mounting bracket 101. A position adjustment holder 103 is connected to the shaft 102. The mounting bracket 101, the shaft 102, and the position adjustment holder 103 are collectively referred to as a mounting mechanism or mounting means 100.
[0014]
The surveillance camera 1A includes an imaging unit 1A1, a circuit unit 1A2, and a cable 1A3. The imaging unit 1A1 is oriented in the imaging direction D. In front of the imaging direction D, for example, there is a monitoring area where an ATM is installed. In the present embodiment, monitoring camera 1A images the area where ATM is installed as the monitoring area. The cable 1A3 includes the coaxial cable 5A illustrated in FIG. 1 and also includes a power supply line that supplies power to the power supply unit of the circuit unit 1A2. The internal configuration of the surveillance camera 1A will be described with reference to FIG.
[0015]
Referring to FIG. 2, the position adjustment holder 103 is connected to one end of the upper part of the circuit unit 1A2 of the surveillance camera 1A.
The tip of the position adjustment holder 103 is fixed to the shaft 102 so that the optical axis of the monitoring camera 1A is slightly obtuse with respect to the vertical direction so that the monitoring camera 1A can capture the above-described monitoring region. The fixed angle of the position adjustment holder 103 with respect to the shaft 102 defines the vertical imaging direction of the monitoring camera 1A.
The horizontal direction of the monitoring camera 1A can be adjusted by adjusting the rotation angle of the position adjustment holder 103.
Thus, the visual field of the monitoring camera 1A can be adjusted three-dimensionally by adjusting the attachment angle of the position adjustment holder 103 with respect to the shaft 102 and adjusting the rotation angle of the position adjustment holder 103.
[0016]
On the other hand, if the fraudster changes the fixing angle of the position adjustment holder 103 with respect to the shaft 102 or changes the rotation angle of the position adjustment holder 103, the field of view of the monitoring camera 1A will be out of the monitoring area described above. Also become. In order to detect such a change in the orientation of the monitoring camera 1A, in the present embodiment, two gyro sensors, that is, a gyro sensor 13a for vertical angular velocity detection and a horizontal angular velocity detection are provided in the imaging unit 1A1. A gyro sensor 13b was provided.
[0017]
A gyro sensor is an angular velocity sensor that detects vibration of a piezoelectric vibrator such as a ceramic bimorph vibrator as Coriolis force, converts the detection signal into an electric signal, and outputs the electric signal.
The gyro sensor is, for example, a size of about 8 mm in length, 15 mm in width, and about 4 mm in height, and can be easily attached to the imaging unit 1A1 of the monitoring camera 1A. In addition, the gyro sensor does not need to be relatively positioned like the light projecting / receiving unit and the reflection unit in the monitoring camera device disclosed in Japanese Patent Laid-Open No. 10-185940, and has an advantage that it only needs to be attached to the monitoring camera 1A.
Since one gyro sensor basically detects an angular velocity in one direction, two gyro sensors are required to detect angular velocities in two directions, for example, the horizontal direction and the vertical direction at the same time. In order to detect at least the angular velocity in one direction, for example, one of the gyro sensor 13a for detecting the vertical angular velocity and the gyro sensor 13b for detecting the horizontal angular velocity may be provided. An example in which two gyro sensors 13a and 13b are provided will be described.
The maximum rotational moment is generated at the position adjustment holder 103 and the connection point between the shaft 102 and the position adjustment holder 103, which are fixed and rotatable fulcrums of the surveillance camera 1A so that a larger angular velocity can be detected. It is preferable to provide a gyro sensor at the distal end portion of the imaging unit 1A1 that is the part that is the farthest from the fulcrum. In the present embodiment, a vertical angular velocity detecting gyro sensor 13a and a horizontal angular velocity detecting gyro sensor 13b are provided in the vicinity of the tip of the imaging unit 1A1.
In the present embodiment, the gyro sensors 13a and 13b are provided inside the monitoring camera 1A so that they cannot be visually recognized from the outside in order to eliminate fraudulent acts on the gyro sensors 13a and 13b.
[0018]
FIG. 3 is a configuration diagram of one of the monitoring cameras 1A to 1D. The surveillance cameras 1A to 1D have the same configuration. As a representative, the surveillance camera 1A will be described. The surveillance camera 1A includes an imaging unit 10, a sound collection unit 11, a signal transmission unit 12, and a detection unit 13.
The image pickup unit 10 is located in the image pickup unit 1A1 illustrated in FIG. 2, and includes a lens, a charge-coupled device (CCD), and the like. An image passing through the lens is converted into an electric signal in the CCD. And output as imaging data (image data).
The sound collection unit 11 is provided in the imaging unit 1A1 illustrated in FIG. 2 and includes a microphone. The sound collection unit 11 collects sound in the monitoring area, converts the sound into an electric signal, and outputs it as a sound detection signal. The sound collection unit 11 can be provided at an arbitrary position instead of the imaging unit 1A1.
The signal transmission unit 12 is provided in the circuit unit 1A2 illustrated in FIG. 2, and receives the image data output from the imaging unit 10 and the sound detection data output from the sound collection unit 11, and outputs these signals. A predetermined output signal is converted and sent to the controller 2 via the coaxial cable 5A.
The detection unit 13 includes a vertical angular velocity detection gyro sensor 13a and a horizontal angular velocity detection gyro sensor 13b attached to the imaging unit 1A1 illustrated in FIG. 2 and a processing circuit 13c that processes the angular velocity signals output by these gyro sensors. It is a generic illustration.
In the present invention, the angular velocity itself or a signal indicating the change in angular velocity can be used as a signal for detecting a change in orientation.
[0019]
FIG. 4 is a configuration diagram of the controller 2.
The controller 2 and, for example, the monitoring camera 1A are connected by a coaxial cable 5A housed in the cable 1A3 illustrated in FIG. 2, and the controller 2 is installed at a location away from the installation position of the monitoring camera 1A. Has been. The connection relationship between the controller 2 and the other monitoring cameras 1B to 1D is the same as described above.
The controller 2 includes an image processing unit 20, an image output unit 21, an operation unit 22, a control unit 23, an interface unit 24, a power supply unit 26, a power interruption detection unit 27, and an alarm output unit 28. . An authentication unit 25 is provided outside the controller 2 and in the vicinity of the controller 2.
The image processing unit 20 divides the image data in the four surveillance cameras 1A to 1D input via the coaxial cables 5A to 5D into four and compresses the image data into one screen image data. Further, the image processing unit 20 selects one audio signal from the four types of audio signals according to the control signal of the control unit 23 and inputs it to the image output unit.
The image output unit 21 outputs the four image data synthesized by the image processing unit 20 and the selected audio signal to the time lapse video apparatus 3 via the coaxial cable 6.
The operation unit 22 has setting and operation instruction switches and the like, and is an area where the operator performs various settings and operation instructions to the controller 2 via these switches.
The control unit 23 is composed of a computer control unit (CPU) or the like. Based on the conditions set by the operation unit 22 and the conditions already defined, the control processing of the image processing unit 20 and the alarm output unit 28 are controlled. Control processing and control processing of the authentication unit 25 connected via the interface unit 24 are performed.
The interface unit 24 is configured by, for example, RS232C, and performs signal exchange (signal relay) between the authentication unit 25 and the control unit 23.
The control unit 23 cooperates with the authentication unit 25 through the interface unit 24 to perform authentication processing on the qualification of the operator who operates the controller 2 through the operation unit 22. Only an authenticated operator can perform a setting operation using the operation unit 22.
The authentication unit 25 is, for example, a card reader.
The interface unit 24 depends on the authentication unit 25 and has a circuit configuration suitable for it.
The power supply unit 26 generates a voltage for operating an electric circuit in each electric circuit and / or an electronic circuit in each electronic circuit in the controller 2 and supplies power to each circuit in the controller 2.
The power interruption detection unit 27 monitors the power supply voltage of the power supply unit 26 and detects that the voltage of the power supply unit 26 has been lost. For example, the alarm device 4 connected to the power-off detection unit 27 by using a relay that operates at the voltage of the power-supply unit 26 as the power-off detection unit 27 and closing the contact of the relay when the voltage of the power-supply unit 26 is lost. It is possible to detect power-off of the power supply unit 26.
The alarm output unit 28 is illustrated when the image data from any of the monitoring cameras 1A to 1D is interrupted in the image processing unit 20 due to, for example, an unauthorized person disconnecting the cable 1A1 illustrated in FIG. An alarm signal is output to the alarm device 4 illustrated in FIG.
[0020]
FIG. 5 is a configuration diagram of the image recording apparatus 3.
The image recording apparatus 3 includes a recording unit 31, an operation unit 32, a control unit 33, an interface unit 34, a power supply unit 36, a power interruption detection unit 37, and an alarm output unit 38. An authentication unit 35 is provided outside the image recording apparatus 3.
The recording unit 31 records the image data of one screen compressed into four divisions received from the controller 2 on a video tape.
The operation unit 32 performs operations such as start and stop of recording, timer operation, and video tape attachment / detachment.
The control unit 33 is constituted by a computer control unit (CPU) and the like, and performs operation control of the recording unit 31, the alarm output unit 38, and the like.
The interface unit 24 is configured by, for example, RS232C, and performs signal exchange (signal relay) between the authentication unit 35 and the control unit 33.
The control unit 33 cooperates with the authentication unit 35 through the interface unit 34 to perform authentication processing on the qualification of the operator who operates the image recording apparatus 3 through the operation unit 32. Only an authenticated operator can perform various setting operations on the image recording apparatus 3 using the operation unit 32.
The authentication unit 35 is, for example, a card reader.
The interface unit 34 has a circuit configuration that depends on the authentication unit 35 and the control unit 33 and is adapted thereto.
The power supply unit 26 generates a voltage for operating the electric circuit in each electric circuit and / or the electronic circuit in each electronic circuit in the image recording apparatus 3 and supplies power to each circuit in the image recording apparatus 3.
The power-off detection unit 37 monitors the power supply voltage of the power supply unit 36 and detects that the voltage of the power supply unit 36 has been lost. For example, the alarm device 4 connected to the power-off detection unit 27 by using a relay that operates at the voltage of the power-source unit 36 as the power-off detection unit 37 and closing the contact of the relay when the voltage of the power-source unit 36 is lost. It is possible to detect power-off of the power supply unit 36.
The alarm output unit 38 outputs an alarm signal to the alarm device 4 illustrated in FIG. 1 when, for example, image data sent from the controller 2 to the recording unit 31 is interrupted.
[0021]
The operation of the surveillance camera device of this embodiment will be described. In particular, a process when the imaging direction of any one of the monitoring cameras 1A to 1D in the monitoring camera device of the present embodiment is changed will be described.
As an initial operation, the power of each part of the monitoring cameras 1A to 1D is turned on. As a result, the monitoring cameras 1A to 1D image the imaging regions in the respective imaging units 10, and the imaging results are converted into, for example, NTSC system image signals in the signal transmission unit 12 via the coaxial cables 5A to 5D. It is sent to the controller 2.
The image processing unit 20 in the controller 2 converts the four image data captured by the monitoring cameras 1A to 1D into one screen image data. The image output unit 21 outputs the image data to the image recording device 3.
[0022]
Here, when the imaging direction of any one of the monitoring cameras 1A to 1D is changed, the monitoring camera whose imaging direction is changed, for example, when the imaging direction of the monitoring camera 1A is changed, is installed in the monitoring camera 1A. The vertical angular velocity detecting gyro sensor 13a and / or the horizontal angular velocity detecting gyro sensor 13b illustrated in FIG. 2 outputs a signal corresponding to the angular velocity of the rotation, and the processing circuit 13c has an angular velocity signal equal to or higher than a predetermined level. When the change of the angular velocity is indicated, a signal is output to the signal transmission unit 12 on the assumption that the direction operation of the unauthorized monitoring camera 1A is performed.
[0023]
The signal sending unit 12 converts the detection result from the processing circuit 13c into a predetermined signal, and outputs the signal together with the image data to the controller 2 via the coaxial cable 5A.
[0024]
The image processing unit 20 of the controller 2 receives the image data input via the coaxial cable 5 </ b> A and the signal detected by the gyro sensor, and the image processing unit 20 sends the signal to the control unit 23.
When the control unit 23 receives the signal, the control unit 23 sends the result to the alarm output unit 28 as an abnormal signal.
The alarm output unit 28 outputs an abnormal state to the alarm device 4 as an alarm signal.
When receiving the alarm signal, the alarm device 4 outputs an alarm to a security center (not shown) through a telephone line. As a result, the security guard at the security center is notified that the imaging direction of the surveillance camera 1A has been illegally changed, and an appropriate measure can be taken quickly.
[0025]
As described above, the example in which the gyro sensor 13a for detecting the vertical angular velocity and the gyro sensor 13b for detecting the horizontal angular velocity are provided as the preferred embodiment has been described. Even by providing only one of the gyro sensors 13b, at least a change in the direction of the monitoring camera 1A in the one-dimensional direction can be detected. The signal sending unit 12 may always send a pilot signal having a predetermined frequency to the controller 2 and stop sending the pilot signal when the gyro sensor detects an abnormality.
In this case, when the controller 2 cannot receive the pilot signal, the controller 2 determines that the monitoring camera is abnormal and transmits an abnormal signal to the alarm device 4.
[0026]
Second embodiment
With reference to FIG. 6, a surveillance camera device as a second embodiment of the present invention will be described.
FIG. 6 is a view showing a mounting state of the surveillance camera as the second embodiment of the present invention corresponding to FIG.
6 is similar to that of the surveillance camera illustrated in FIG. 2, but in FIG. 6, a return mechanism 105 is provided between the mounting bracket 101 and the shaft 102. ing. That is, the attachment means 100A illustrated in FIG. 6 has a structure in which a return mechanism 105 is added to the attachment means 100 illustrated in FIG. Other components are the same as those described with reference to FIG.
[0027]
FIG. 7 is a diagram illustrating the structure of the return mechanism 105 illustrated in FIG. 7A is a perspective view of the return mechanism 105, FIG. 7B is an enlarged side view of the return mechanism 105, and FIG. 7C is an exploded cross-sectional view of the return mechanism 105.
The return mechanism 105 is configured by combining an upper main body 105a, a lower main body 105b, and a spring 105c.
Male screws protrude above and below the upper body 105a. The upper male screw of the upper body 105 a is screwed into the lower female screw of the mounting bracket 101 to fix the return mechanism 105 to the lower portion of the mounting bracket 101.
A hole is provided in the center of the lower main body 105b, a female screw into which a lower male screw of the upper main body 105a is screwed is formed in the upper hole of the lower main body 105b, and a shaft 102 is formed in the lower hole of the lower main body 105b. A female screw into which a male screw (not shown) is screwed is formed.
[0028]
  One end of the spring 105c is fixed to the spring fixing hole of the upper main body 105a, and the external thread of the upper main body 105a and the lower main body 105b is accommodated in the spring 105c, and the lower male screw of the upper main body 105a is connected to the lower main body 105b. When the other end of the spring 105c is fixed to the screw fixing portion of the lower main body 105b, the return mechanism 105 illustrated in FIG. 7A is assembled. When a reverse rotational force is applied to the upper body 105a and the lower body 105b of the return mechanism 105, for example, when a force is applied to rotate the upper body 105a to the left L and rotate the lower body 105b to the right R, the spring The upper body 105a rotates counterclockwise and the lower body 105b rotates clockwise against the elastic force of 105c. However, the rotational forcereleaseThen, due to the restoring force of the spring 105c, the upper main body 105a and the lower main body 105b instantaneously return to their original positions.
[0029]
The return screw 105 is fixed to the lower portion of the mounting bracket 101 by screwing the upper male screw of the upper body 105 a into the lower female screw of the mounting bracket 101. Furthermore, the male screw provided on the upper part of the shaft 102 is screwed into the female screw on the lower part of the lower main body 105 b to fix the shaft 102 to the lower part of the return mechanism 105.
[0030]
When the return mechanism 105 is provided between the mounting bracket 101 and the shaft 102 in this way, for example, when the imaging direction of the imaging unit 1A1 is changed by applying a horizontal force to the imaging unit 1A1 of the surveillance camera 1A, the return mechanism 105 returns. The direction of the imaging unit 1A1 can be changed against the elasticity of the spring 105c of the mechanism 105. However, when the hand is released from the imaging unit 1A1, the orientation of the imaging unit 1A1 rapidly returns to the original due to the restoring force of the spring 105c. At this time, the horizontal angular velocity detecting gyro sensor 13b shown in FIG. 2 detects a large angular velocity.
[0031]
For example, when a fraudulent person intends to cheat and slowly rotates the tip of the imaging unit 1A1 to remove the field of view of the monitoring camera 1A from the monitoring area, the horizontal angular velocity detecting gyro sensor 13b is such a slack. Changes in orientation may not be detected. If it does so, the change of the imaging region by the gyro sensor 13b for a horizontal direction angular velocity detection described in 1st Embodiment cannot be detected.
However, when the fraudster releases the imaging unit 1A1, the imaging unit 1A1 instantaneously returns to the original direction due to the restoring force of the spring 105c of the return mechanism 105, so that the horizontal angular velocity detection gyro sensor 13b has a large angular velocity. To detect. The large angular velocity detected by the horizontal angular velocity detecting gyro sensor 13b is sent to the signal sending unit 12 of the monitoring camera 1A and notified to the controller 2, and it can be detected that there is an illegal act on the monitoring camera 1A.
[0032]
As described above, even when the change in the horizontal direction relative to the imaging unit 1A1 is slowed by providing the return mechanism 105, there is an act of changing the imaging direction of the imaging unit 1A1 when the imaging unit 1A1 subsequently returns. Can be detected.
[0033]
In the above example, the return mechanism 105 is provided between the mounting bracket 101 and the shaft 102 to detect the return operation of the imaging unit 1A1 by the horizontal angular velocity detection gyro sensor 13b. A new return mechanism can be provided so that the gyro sensor 13a can detect the return of the change in the vertical direction. For example, a return mechanism (second return mechanism) similar to the return mechanism 105 (first return mechanism) is attached to the position adjustment holder 103 so as to be rotatable on both sides in a direction orthogonal to the ceiling. In that case, the return of the imaging unit 1A1 due to the restoring force by the spring of the second return mechanism can be detected by the gyro sensor 13a for vertical angular velocity detection.
[0034]
Thus, by providing two return mechanisms so as to detect vertical and / or horizontal return operations, the vertical angular velocity detection gyro sensor 13a and / or the horizontal angular velocity detection gyro sensor 13b Such fraud can be detected.
[0035]
The implementation of the surveillance camera device of the present invention is not limited to the above-described embodiment, and various modifications can be made.
[0036]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, it can detect effectively that the imaging direction or visual field of imaging means, such as a surveillance camera, changed.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a surveillance camera device according to a first embodiment of the present invention.
FIG. 2 is a diagram illustrating a mounting state of a surveillance camera as a first embodiment of the present invention.
FIG. 3 is a configuration diagram of a surveillance camera.
FIG. 4 is a configuration diagram of a controller in the surveillance camera device.
FIG. 5 is a configuration diagram of an image recording device in a monitoring camera device.
FIG. 6 is a diagram illustrating an attachment state of a surveillance camera as a second embodiment of the present invention.
7 is a diagram illustrating the return mechanism illustrated in FIG. 6, FIG. 7 (A) is a perspective view of the return mechanism, and FIG. 7 (B) is an enlarged side view of the return mechanism; FIG. 7C is an exploded sectional view of the return mechanism.
[Explanation of symbols]
1A ~ 1D ... surveillance camera
1A1 ... Imaging unit
1A2 ・ ・ Circuit part
1A3 cable
10. Imaging unit
11. Sound collection part
12. Signal sending part
13. Detection unit
13a .. Gyro sensor for detecting angular velocity in the vertical direction
13b..Gyro sensor for horizontal angular velocity detection
2. Controller
20. Image processing unit
21. Image output part
22. Operation unit
23..Control part
24. Interface section
25 ・ ・ Authentication Department
26 .. Power supply
27 .. Power-off detector
28. Alarm output section
3. Image recording device
31. Recording unit
32..Operation part
33..Control part
34. Interface section
35 ・ ・ Authentication Department
36 .. Power supply
37..Power-off detector
38 .. Alarm output section
4. Alarm device
100 .. Mounting means
101 ・ ・ Mounting bracket
102 .. axis
103 .. Position adjustment holder
105 ... Return mechanism
105a ... Upper body
105b ... Lower body
105c ... Spring

Claims (3)

A monitoring camera that includes a sensor that outputs a change in the imaging direction as an angular velocity, and that captures a predetermined monitoring area; an attachment means for installing the monitoring camera in a fixed portion so that the predetermined imaging direction is directed; and a detection unit for detecting that the imaging direction of the monitoring camera is changed on the basis of the output of, in the detection unit and an output unit for outputting a detection signal for detecting a change in the imaging direction monitoring camera apparatus There,
The attachment means includes
A mounting bracket fixed to the fixed portion;
It is installed between the monitoring camera and the mounting bracket, changing the imaging direction of the monitoring camera
That when rotational force is applied against the elasticity of the spring changes the image pickup direction, the to return the imaging direction of the monitoring camera in the original imaging direction by the restoring force of the spring when the rotational force is released return and means, monitoring camera apparatus, characterized in that. The return means includes
A first body having a male thread;
A second body having a female screw into which the male screw is screwed ,
It said spring is Ru is fixed to the first body and the second body so as to have a restoring force when a force is applied in the direction of rotation of the screw
Surveillance camera apparatus according to 請 Motomeko 1. The return means includes
First return means in which the direction of rotation of the screw is horizontal;
Second return means in which the direction of rotation of the screw is vertical;
The surveillance camera device according to claim 2, comprising:

Images